Question 1

Is the BT 7 fitted with a temperature override switch?

Accepted Answer

Be careful.  The model numbers are very confusing on these Backer thermostats with people using manufacturer's numbers, distributor stock numbers and simplistic brand numbers like 'BT7'.  First check whether you have a separate high temperature safety cut out (i.e. needs manual resetting and does not form part of the automatic switching on/off of the thermostat in normal use) mounted separately in the head of your heater element, or if the cut out is a manually resettable button within the head of the removable thermostat.  Choose a thermostat with/without the resettable safety cut out as needed: you absolutely should have a safety cut-out one way or the other, otherwise you risk your immersion heater turning into a permanently 'on' kettle until your tank etc is literally boiling and may risk ruptures, explosions, leaks (remember 3 Mile Island and Chernobyl) and your insurer may not be cooperative.  Also, if you buy the wrong thermostat, the head may be too big to fit within the head cover of the heater element.  Look carefully at your outgoing thermostat head and then zoom in to the pictures of the various units on offer to be sure you can see the differences and choose accordingly.

Question 2

Which is the live terminal

Accepted Answer

Is does not matter the  but the thermostat normally finds its own position you can put the lead from the lmmersion heater in either side and the live supply  ie the brown wire opposite hope this is useful.

Question 3

Where is the maximum temperatures on the dial as it is not clear

Accepted Answer

There is a plus and minus symbol on it turn it to plus

Question 4

can the heater rod be removed? thanks

Accepted Answer

Assuming you mean can this thermostat rod be removed without draining the system, yes it can. However, you have to disconnect the electrical conductors first and then reconnect them after inserting the new thermostat, so you have to be confident that you can do this safely. If you need to replace the immersion element itself, you have to drain the system first.

ASIN	B003XR7DFM
Best Sellers Rank	267,951 in DIY & Tools ( See Top 100 in DIY & Tools ) 645 in Water Heaters & Parts
Brand	Backer
Colour	Copper
Customer Reviews	4.4 4.4 out of 5 stars (59)
Item Length	7 Inches
Manufacturer	Backer
Manufacturer Part Number	BT7
Material Type	Copper
Model Number	BT7
Number of Items	1
Number of Packs	1
Unit Count	1.0 count
Voltage	240 Volts
Wattage	3600 watts

Backer BT7 Immersion Heater Rod Thermostat 15A 7 Inches IMM7ST

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